Needle device for medial injections and blood transfusions



June 21, 1960 v, CHAUDQN 2,941,529

NEEDLE DEVICE FOR MEDIAL INJECTIONS AND BLOOD TRANSFUSIONS Filed July 18, 1956 Fla/ INVENTOR. I 17.40am; V cxmuzo v A TTUR/VEVS NEEDLE DEVICE FOR MEDIAL INJECTIONS AND BLOOD TRANSFUSIONS Maurice Victor Chaudon, Ave. Durante, Nice, A.M., France Filed July 18, 1956, Ser. No. 598,673 Claims priority, application France July 21, 1955 7 Claims. (Cl. 128-215) This invention relates to needle, syringe, and cannula devices of the type used particularly for injections, blood 7 transfusions, and other similar medical operations.

A specific object of the invention is to provide improved means for securing or clamping a needle to the tapered nozzle or nipple of a syringe, cannula or the like, and for latching the needle thereon so as to positively prevent removal of the needle during the injection, transfusion or draining operation.

'Although latching devices have been proposed for securing the needle on the nozzle or nipple of a syringe, cannula or the like, it is a further object of the invention to provide latching devices of the described character which will be simpler to construct and operate and more eflicient and reliable than the existing latching devices.

A further object is to provide an improved latchable syringe and needle assembly which may include either a standard or conventional needle unit or a standard or conventional syringe unit.

Still another object of the invention is to provide a syringe and needle assembly wherein the syringe has a tapered nipple and the removable needle is provided with a base having a socket opening at one end of the base to receive the nipple, and wherein the latching device for securing the needle on the syringe permits the nipple to be axially inserted into and removed from the socket of the needle, while the needle is securely latched or released merely by turning of the needle relative to the syringe when such components are disposed with the nipple of the syringe inserted within the socket of the needle.

In accordance with an aspect of the invention, a syringe and the like having a tapered nipple and a removable needle with a base having a socket opening at one end of the base to receive the nipple are provided with a latching arrangement comprising two jaws extending generally axially from the base at opposite sides of the socket and defining a space between the jaws which gradually decreases in width at least from locations intermediate the lengths of the jaws to the free ends of the latter, and a boss having the tapered nipple extending axially therefrom, with such boss further having a rim portion formed with opposite side surfaces which, between them, define a width that is less than the distance between the free ends of the jaws so that the latter can slidably extend over the opposite side surfaces, the periphery of the rim portion progressively increasing in width in the regions thereof intermediate the opposed side surfaces so that, when the needle is turned, the jaws thereof engage said regions of the rim portion to axially draw the base of the needle onto the nipple of the syringe and to latch the needle on the latter.

In one embodiment of the invention, the jaws extending from the base of the needle have straight confronting edges which converge in the direction toward the free ends of the jaws so that the space therebetween is generally of dovetail configuration, while the boss of the syringe or the like is of generally frusto-conicalcon- 2 figuration with the rim portion of the boss appearing at the relatively large diameter end of the frusto conical boss, and with the opposed side surfaces of the boss being defined by substantially flat, parallel surface areas on said frusto-conical boss.

In another embodiment of the invention, the base of 2 the needle has flat sides and a generally cylindrical aperture extending through the base perpendicular to the flat sides of the latter in order to define the space between the jaws, while the rim portion of the boss of the syringe or the like is in the form of an annular bead having opposed, parallel flattened areas defining said opposed side surfaces.

- The above, and other objects, features and advantages of the invention, will be apparent in the following detailed description of illustrative embodiments thereof which is to be read in connection with the accompanying drawing forming a part hereof, and wherein:

Fig. l is a side elevational view of a needle and syringe assembly constructed in accordance with one embodiment of the present invention;

Fig. 2 is an enlarged section-a1 view taken along the line 11-11 of Fig. 1;

Fig. 3 is a view similar to that of Fig. l, but showing another embodiment of the invention;

Fig. 4 is an enlarged sectional view taken along the line IV--IV of Fig. 3; and

Fig. 5 is a view similar to that of Fig. 3, but showing the use of the structural arrangement of Fig. 3 for connecting a needle with a flexible tube. I

Referring to the drawing in detail, and initially to Figs. 1 and 2 thereof, it will be seen that the syringe is provided with a conventional tapered nipple or nozzle 1 adapted to be inserted into a socket 7 opening at one end of a base 6 of the needle 5.

In accordance with the present invention, the syringe is further formed with a boss 2 from which the tapered nozzle 1 projects axially, and the base 6 of the needle has jaws 8 and 9 extending generally axially from the end of the base at which the socket 7 opens, with such jaws being disposed at opposite sides of the socket and being adapted to cooperate with the boss 2 for securely latching the needle on the syringe.

In the embodiment of the invention illustrated in Figs. 1 and 2, the jaws 8 and 9 have inner faces that converge toward the free ends of the jaws so that the space 13 therebetween is in the form of a dovetail groove, while the boss2 is generally of frusto-conical configuration increasing in diameter toward the base of the tapered nozzle 1, that is, toward the rim of the boss, and such rim is formed with a pair of opposed, flattened sides 3 and 4 (Fig. 2) which are spaced apart by a distance smaller than the lateral distance between the free ends of jaws 8 and 9, thereby to permit free axial sliding movement of the jaws along the flattened sides 3 and 4.

By reason of the above described configuration of the jaws 8 and 9 and of the boss 2, the tapered nipple 1 can be axially inserted in the socket 7 while the needle is rotatably positioned so that the jaws 8 and 9 will straddle the flattened sides 3 and 4 of the boss, and thereafter turning of the needle will engage the converging inner faces of the jaws 8 and 9 with the portions of the frustoconical boss 2 intermediate flattened sides 3 and 4, as in Fig. 2, in order to latch the needle on the syringe. Similarly, when the needle is turned from its latched position illustrated in Fig.2 so that the jaws 8 and 9 once again straddle the flattened sides 3 and 4, the needle can be axially removed from the syringe with the jaws passing axially over the flattened sides 3 and 4 during such removal of the needle.

If the boss 2 was formed with an accurately frusto- Patented June21, 1960 a Fig. 2, rotational movement of the needle with respect to the syringe would achieve the desired mutual engagement of the converging inner faces of the jaws 8 and 9 with the portions of the surface of the boss 2 intermediate the flattened sides 3 and 4, and thereby latchv the needle on the. syringe, but the latching action would not achieve a fluid tight seal between the nipple 1 and the socket 7; of the needle base 6. In order to attain a fluidtigh-t seal, between the nipple 1 and the socket 7, the portions of the boss intermediate the flattened sides 3 and 4 are slightly rabbeted adjacent to theflattened sides, as indicated at 12 (Fig. 2 by the use of a file or other suitable tool, so that, in'each of the regions 12, the side bearing surface of the boss 2 is at a progressively varying angle to the axis of the boss, such angle having a maximum value equal to the angle of the frusto-conical basic side surface of the boss. and decreasing to zero at the related flattened side. 3 or 4 which extends parallel to the axis of the boss." Thus, the boss. 2 is formedwith modified bearing or engaging surfaces 12 which constitute extensions of the flattened sides 3 and 4, and, as a result of thesemodified bearing surfaces, turning of the needle in the direction indicated by the arrow fon Fig. 2 causes the jaws 8 and 9 to gradually engage the inclined surfaces of the boss and to simultaneously draw the needle axially towards the boss 2.

In addition to providing for a fluid tight seal between the nipple 1 and the socket 7, the modified bearing surfaces 12. des cri-bedvabove provide for taking upanywhere that may occur between the tapered nozzle and socket.

Referring. now to Figs. 3 and 4, it will be seen that, in the embodiment of the invention there illustrated, the base 6a of the needle a has flat sides and is formed with a generally cylindrical aperture 13a which extends therethrough perpendicular to the flat sides of the base and defines the'space between the jaws 8m and 9a. By reason of the described shape of the aperture 13a, the jaws are of hooked configuration, that is, the inner faces of the jaws initially diverge and then converge in the direction toward the free endsof the jaws 8a and 9a. a

The syringeof the embodiment illustrated in Eigs. 3 and 4 has a boss which, at its rim adjacent the baseof the'tapered nipple 1a extending axially from the boss, is formed with a rounded bead 2a having an outer diameter that is larger than the distance between the free ends of the jaws 8a and 9a. The bead 2a has a pair of opposed flattened sides 3a and 4a (Fig. 4) which are spaced apart by a distance smaller than the distance between the free ends of the jaws 8a and 9a so that the latter can loosely embrace the flattened sides 3a and 4a during axial dis? placement of the needle relative to the syringe.

As in the embodiment of the invention described with reference to Figs. 1 and 2, portions of the bead Za-adjacent the flattened sides 3a and 4a are rabbeted, as at 12a, for example, by filing or the like, thereby to provide a progressive increase in the efiective diameter of the head from the flattened sides 3a and 4a to the remaining portions of the bead intermediate such flattened sides. Thus, when the needle. is installed on the syringe by axially inserting the tapered nipple 1a into the related socket of the base 6a of the needle with the jaws 8a and 9a passing axially along the flattened sides 3;: and 4a,. and thereafterthe needle is turned in the direction of the arrow f on Fig. 4, the engagement of the jaws 8a and 9a with the portions 1'2a'of the bead 2 1 causes a gradual axial displacement of the 'needle further onto the tapered nipple 1a, and thereby effects. a fluid tight seal between the nipple and the base of the needle as well as latching of the'needle'to the syringe.

In Fig." 5 of the drawing, there is illustratedthe application of the arrangement illustrated in Figsf3 and .4 to the secure attachment ofIthe needle 5a to a nozzle 14 which is connected through flexible tubing 15 with a bulb (not shown) of. physiological. serum, plasma, blood 'or other fluid It will be seen that the.;nozzle;l4 is pro-- vided with a tapered nipple 1a and a rounded bead 2a corresponding to the parts of the syringe bearing the same reference numerals in Figs. 3 and 4, and cooperating in the same manner with the jaws 8aand 9a provided on the base 6a of the needle 5a. In order to facilitate the manipulation of the connection during the latching of the needle onto the nozzle 14, the latter is preferably provided with a pair of flanges, wings or fins 16 by which the nozzle may be gripped to avoid twisting of the tube 15 during; turning; Qf the needle.

It will be apparent from the-foregoing that, in the described embodiments of the, invention, it is readily possible to fit a standard needle onto the tapered nipple of the; syringe or nozzle, since, such tapered nipple-projects entirely beyond the boss or bead provided for cooperation with the latching jawsof the needle. Conversely, a needle having a base provided with the improved, latching jaws can be fitted onto any,, or atleast most,- of, the existingtypesof syringes, since such latching jaws are short enough in their longitudinal extent beyond; the tapered, socket. of the needle base to clear the body of the syringe, and are also spaced apart a sufficient distance from each other so as to allow a standard intermediatesyringe connector or nipple to pass freely therebetween.

It is further to be noted that the described embodi: ments of the invention are considerably simpler, and therefore less costly,,than the conventional latching arrangements, and. that the securing and releasing of the latching arrangement is considerably facilitated. The latching arrangements embodying the invention further have. the advantage of facilitating the thorough and efficient cleaning thereof, and this is a major consideration in the type of medical'instruments to which reference has been made.

Although illustrative embodiments of the invention have been described in detail herein with reference to the accompanying drawing, it is to be noted that the invention is not limited to those precise embodiments, and that various changes and modifications may be effected therein without departing from the scope or. spirit of the invention, except as defined in the appended claims.

What I claim is 1. In a syringe and the like having a tapered nipple and a, removable needle with a base having a socket opening atone end of the base to receive the nipple; an arrangementfor latching said needle to said nipple comprising two jaws extending generally axially from said oneend of the base at opposite sides of said socket and defining a space between said jaws which gradually decreases in width at least from locations intermediate the lengths of said jaws to the free ends of the latter, and'a boss havingsaid nipple extending axially therefrom, said boss having arim portion formed with opposed sidesurfaces. which, between them, define a width that is less than the distance between said free ends. of'the jaws so that the latter can slidably extend over said'opposed side surfaces, the periphery of said rim portion progressively increasing in width in the regions thereof intermediate said opposed side surfaces so that, when the needle is turned, said jaws engage said regions of the rimportion to axially draw said base onto the nipple and to. latch the needle on the latter.

2. In a sy'ringe and the like having a tapered nipple and a removable needle. with a base having a socket opening atoneend of the base to receive the. nipple; an arrangement as in claim 1, wherein saidfjaws have straight confronting edges which convergeinthe direction toward said free ends of the jaws so that saidspace therebetween is generally of dove-tail configuration; and wherein said bossis of generally fl'llStQ-COIllCHl configuration with said rim portionat the relatively large diameter endof the frusto-conical boss-and, with said-opposedside surfaces being defined by substantially flat, parallel. surface-areas oa.s ...frus.to-. on l,b s I 3. In a syringe and the like having a tapered nipple and a removable needle with a base having a socket opening at one end of the base to receive the nipple; an arrangement as in claim 1, wherein said base has fiat sides and, at said one end thereof, has a generally cylindrical aperture extending through the base perpendicular to said flat sides of the latter to define said space between the jaws, and wherein said rim portion of the boss is in the form of an annular bead having opposed, parallel flattened areas defining said opposed side surfaces.

4. In a syringe and the like having a nipple and a removable needle with a base having an axial socket opening at one end of the base to receive the nipple; an arrangement for latching said needle to said nipple comprising two jaws extending generally axially from said one end of the base at opposite sides of said socket and defining a space between said jaws which progressively decreases in width toward the free ends of said jaws, said base and jaws having parallel, flat sides at which said space between the jaws opens, and a boss having said nipple extending therefrom, the periphery of said boss having two opposed rim portions which progressively increase in diametrical width along the circumference thereof and opposed side surfaces intermediate said rim portions, with the width of said boss between said side surfaces being less than the distance between said free ends of the jaws so that the latter can slide over said side surfaces of the boss end, when the needle is turned, said jaws engage said rim portions to axially draw said base onto the nipple and to latch the needle on the latter. I

5. In a syringe and the like having a tapered nipple and a removable needle with a base having an axial socket opening at one end of the base to receive the nipple; an arrangement as in claim 4, wherein said jaws have conforting edges which converge toward their free ends so that the space therebetween is generally of dovetail configuration, and wherein said boss is of generally frusto-conical configuration with said rim portions at the relatively large diameter end of the frusto-conical boss and with said side surfaces of the boss being flat and substantially parallel.

6. In a syringe and the like having a tapered nipple and a removable needle with a base having an axial socket opening at one end of the base to receive the nipple; an arrangement as in claim 4, wherein said base has a cylindrical bore extending through said one end perpendicular to said fiat sides of the base to define said space between the two jaws.

7. A nipple of a hypodermic syringe and the like for connection to a needle employed for medical purposes, comprising a boss integral with said nipple and having an annular projecting bead, said bead having two opposed rim portions with the diametrical distance across the latter progressively increasing along the circumference of said head, and two opposed cut portions intermediate said rim portions with a reduced width between said out portions.

References Cited in the file of this patent UNITED STATES PATENTS 1,712,070 Cressler May 7, 1929 1,740,459 Hein Dec. 24, 1929 1,757,680 Neil May 6, 1930 2,047,512 Kaufiman July 14, 1936 2,198,922 Shaw Apr. 30, 1940 2,823,699 Willis Feb. 18, 1958 FOREIGN PATENTS 63,632 France Apr. 20, 1955 

